#include <iostream>
#define ll long long  // 宏定义无分号，替换为 long long

int main() {
    using namespace std;
    float europe_cost_per100;
    cin >> europe_cost_per100;
    float gallon = europe_cost_per100 / 3.785;
    float mile = 62.14;
    float s = mile / gallon; 
    cout << "The cost of driving in the US is " << s << " miles per gallon." << endl;
    return 0;
}
